import numpy as np
import matplotlib.pyplot as plt


x = np.arange(0, 6, 0.1)
y1 = np.sin(x)
y2 = np.cos(x)

plt.plot(x, y1, label='sin')
plt.plot(x, y2, label='cos', linestyle='--')
plt.title(' sin & cos ')
plt.legend()
plt.show()
